*Not only are levels of Suspended Particulate Matter above permissible limits in Mumbai, but the worst pollutant after vehicular emissions has grown at an alarming rate. *Construction work among main causes; respiratory diseases are on the rise, say doctors Despite all the efforts to reign in pollution in the financial capital, data collected by a slew of mobile air quality monitoring vans across the city have some alarming news: The levels of Respirable Suspended Particulate Matter (RSPM), or dust, in Mumbai's air have continued to increase over the past three years.